Error connecting 10g with vb6 in vista?

Hi,
I am using oracle 10g and vb 6 on vista. When i try connecting it i get this
Error = -2147467259 (80004005)
Error string: [Microsoft][ODBC Driver Manager] Driver's SQLAllocHandle on SQL_HANDLE_ENV failed

It works the first time till i don't restart the comp, then if i repair or reinstall it works till I don't restart the computer again. The same problem i faced on other comp which has windows 7. It sounds like maybe vista/7 has some problem, but I know people who are using same config and vista and it works for them without any problem. I don't know how to fix this problem. Please help...

Hey I got it!!
Vista/7 is really annoying with its "security" thing!!
Just goto Vb6.exe file (the main file which runs the vb6)
If you don't know how to find it
goto start and goto visual basic 6
right click and select properties -> open file location
when you can see the exe file
right click, goto compatibility -> run as administrator -> ok
run it and it will work flawlessly....

Thanks the link you gave me the idea, they gave something different but it clicked me as this i had done for 3d studio max 9 and it worked!